Ridley Scott’s Alien (1979) was released forty years ago this May, and since then, the Hollywood extraterrestrial has evolved into something more scientifically feasible than the xenomorph, according to Business Insider. Before CGI, science fiction films in the 1950s and 1960s dressed actors in alien costumes, and because sci-fi is often an allegory for society’s fears, these humanoids are almost always hostile, even though physicist and author Sidney Perkowitz says no lifeform is evil for the sake of itself. With mosquitoes carrying viruses farther due to climate change, and filmmakers concerning themselves more with box office figures than scientific accuracy, Daniel Espinosa’s Life (2017) realistically posits that alien life will be discovered microscopically, but still villainizes it.